Bis(2,4-dioxo­pentan-3-ido-κ²O,O′)dioxidomolyb­denum(VI): a redetermination

The crystal structure of cis-[MoO₂(acac)₂] has been redetermined at 100 K, providing a more precise description of the structure including hydrogen atoms and inter­molecular contacts.

(Chlorido/bromido)[(1,2,5,6-η)-cyclo­octa-1,5-diene](4-iso­propyl-1-methyl-1,2,4-triazol-5-yl­idene)rhodium(I)

The Rh^I atom in the title compound has a distorted square-planar coordination environment, defined by a bidentate cyclo­octa-1,5-diene (COD) ligand, an N-heterocyclic carbene and a chloride ligand with bromide substitutional disorder.

1-Butyl-3-methyl­imidazolium tri­bromido­(tri­phenyl­phosphane-κP)nickelate(II) butan-1-ol hemisolvate

The title compound consists of 1-butyl-3-methyl­imidazolium cations, tri­bromido­(tri­phenyl­phophine)nickelate(II) anions and co-crystallized 1-butanol solvent mol­ecules.

(4-Benzyl-1-methyl-1,2,4-triazol-5-yl­idene)[(1,2,5,6-η)-cyclo­octa-1,5-diene](tri­phenyl­phosphane-κP)iridium(I) tetra­fluorido­borate

The cationic complex in the title salt, [Ir(C₈H₁₂)(C₁₈H₁₅P)(C₁₀H₁₁N₃)]BF₄, exhibits a distorted square-planar geometry around the Ir^I ion.

Poly[octa­carbonyl­hepta­kis­(tetra­hydro­furan)­diironmanganesedisodium(2 Mn—Fe)]

The title compound is a xenophilic transition-metal cluster with short iron–manganese bonds of 2.6274 (10) and 2.6294 (10) Å. The complex forms a polymeric (two-dimensional) structure through isocarbonyl linkages between the sodium cations and the Fe(CO)₄ fragments of the cluster.

1,1′-Methyl­enebis(4-tert-butyl­pyridinium) dichloride hemihydrate

The title compound, C₁₉H₂₈N₂²⁺·2Cl⁻·0.5H₂O, was prepared by the reaction of 4-tert-butyl­pyridine with di­chloro­methane. One of the chloride anions is clamped between the aromatic rings via anion–π inter­actions.